Cellular packing for fragile objects



' March' 19; 1929.. SCHWARTZBERG 1,706,082

CELLULAR PACKING FOR FRAGILE'OBJEC'I'S Filed March 1927 2 Sheets-Sheet lMarch 19, 192 L. SCHWARTZBERG CELLULAR PACKING FOB FRAGILE OBJECTS 2Sheets-Sheet Filed March 1927 Patented Mar. 19, 1929.

7 LOUIS SGHWARTZBEBG, OF CHICAGO, ILLINOIS.

CELLULAR PACKING FOR FRAGILE OBJECTS.

Application filed March 5, 1927. Serial No. 172,974.

My present invention relates to improvements in cellular packing forfragile objects, such as eggs and objects made of glass, china and thelike. I prefer to mould or otherwise form my packing from paper pulp oranalogous material which is a trifle thicker and softer, but lesspliable, than the same amount of stock after the same has been rolled inac-' cordance with the usual practice in manufacturing paper. I am awarethat paper pulp has already been used in forming packing, and sheets ofsuch material have been pro.- vided having recesses, or cavities orcells of the shape of the articles to be received and packed. Such aconstruction, however, does not afiord facilities for properly receivingobjects of different shape and objects of even a similar shape butdifferent sizes. My present invention, however, is so formed as topermit of a distention of the cells or recesses or cavities and torequire such a distention upon the insertion of the object to be packed,whereby the packed objects are not only separated from each other inseparate cells, but are also restrictively and yieldingly held in theirrespective cells so as to exclude all movement which would otherwiseoccur on account of an imperfect fit of the object in the recess.

It will also hereafter be seen that by arranging the recesses orcavities or cells in rows and inclining the Walls of adjacent cells of.the-

same row and adjacent rows of cells with respect to each other andproviding an area or space of disengagement between the walls betweenadjacent cells of the same row and the walls between adjacent rows ofcells I have introduced an additional spring to the walls of each cellwhich assists the cell in both conforming with and holding the objectplaced therein. 7

While the constrictive holding of the object within the cell is in manycases sufiicient for securing its safety, it is in some cases desirableto provide the cells with bottoms, and instead of forming the bottomsdirectly between the lower edges of the cell walls, I revert the cellwall inwardly and upwardly and then form the bottom of any desiredconfiguration between these inwardly and upwardly reverted edges,whereby there is provided a double annulus at the bottom of'each cellwhich adds materially to both the strength and elasticity of thestructure as a whole.

I secure the foregoing objects and results by means of the structureillustrated in the accompanying drawing in which Fig. l is a plan of astructure comprising two rows of cells formed in accordance with mypresentinvention;

Fig. 2 is a side elevation of the structure shown in Fig. 1, the forwardor near walls of the two cells at the right being broken away to moreclearly show the form and nature of the corrugations in the inner walls;

Fig. 3 is an end elevation of the structure shown in Figs. 1 and 2 inwhich the web between adjacent rows of cells is carried above the cells;

Fig. 4; is a viewsimilar to that shown in Fig. 3, except that the webbetween adjacent rows of cells is not carried above the cells and may beregarded as being suppressed except in so far as being suflicientlypresent as to secure the function of connecting the adjacent rowstogether;

Fig. 5 is av fragmental, perspective, corner view of the structure shownin Figs. 1 to 3 especially showing the length or area of disengagementbetween the walls between adjacent cells in the same row and the wallsbetween adjacent rows of cells;

' Fig. 6 is a plan, similar to Fig. 1, in which the cells are shownwithout corrugations:

Fig. 7 is a side elevation of the structure 7 shown in Fig. 6 the nearwalls of the two cells .cell with a modificd form-of bottom; and

Fig. 10 is a central, vertical, section through a cell showing a stillfurther modified form of bottom.

Similar reference characters refer to similar parts throughouttheseveral views.

The structure may be either regarded as a sheet or blank of material inwhich is provided recesses, cavities or cells, or as parallel rows ofcells connected by webs-extending between their upper adjacent edges.Such sheets or Webs are designated by the reference character 15. TheWalls, or vertical walls, 16, of the individual cells taper inwardlyfrom their upper to their loweredges, which taper is adequate formaintaining objects in adjacent cells properly separated. In the outsidewalls of the outside cells are prowalls to spring, flex or distendoutwardly or rather transversely or horizontally by the insertion of anobject within a cell. In the walls of the cells facing adjacent rows ofcells I also provide corrugations, 18, but these interior corrugationspreferably start from a point about a third or a quarter of the'distancefrom the tops of the cells and gradually increase in dimensions to thebottom of the cells. This feature is shown clearly in Figs. 2 and 5. Thegreater the number of corrugations the greater amount or lateral springwhich the cells have, and, also, which is of importance, the morewidely'the distention occurring in a particular case is distributedaround the walls or" the cell.

The connections or webs, 15, between adjacent cells. oi the same row arepreferably restricted as much as possible to conserve space, so that thewall of one cell upon reaching the top immediately turns downwardly toform the adjacent wall of the adjacent cell. This is shown in Figs. land 5. In

order to secure, or rather retain, thespringarising from the taper ofthesewalls they are cut away or otherwise separated from the wallsextending between the adjacent rows of cells, as shown at 19 in Figs. 5and 8.

In order to increase the spring in the wallsbetween adjacent rows ofcells the web 15 may be extended above the tops of the cells, asparticularly shown at 20 in Figs. 2, 3, 5, 7 and 8. By properlyproportioning these divers features which impart spring to the.

walls of the cells to the weight and strength of the articles to bepacked an unusually high degree of safety may be secured;

When, by reason of the weight of the objects to be packed, or for othercauses, it is deemed that the spring given to the walls of the cells isnot sufficient for safely holding the objects a bottom may be added asshown in Figs. 7 to 10-in'clusive. Instead of extending this-bottomdirectly between the lower edges of the cell walls, I prefer to revertthe cell walls inwardly and upwardly, as at 21. The'bottom is thenextended between the re verted edges either directly, as shown at 22 inFigs.'7 and 8; or with a downward dip as at 23 in. Fig. 9; or with adownward corrugation and upward boss, as at 24 in Fig.

10; or, in tact, in any desired manner to suit the form and weight ofthe objects. The reintorceinent secured by the reversion of the sidewalls of the cells, besides reinforcing the structure as a whole, alsoserves to restrict-the sprin of the cell walls to their central areasliich is peculiarly desirable with certain shapes of objects.

Having described any invention what 1 claim as new and desire to secureby Letters Patent i's,- v

1. A cellular packing consisting of an integral structure moulded fromfibrous pulp comprising a series of cells tapering inwardly on all sidesfrom their tops to their hottoms, said cells being disposed in parallelrows and having a connecting web extendcent cells in the same row andthe walls between adjacent rows of cells being disengaged at their upperends.

lie

3. A cellular packingcon'sistinn of an in tegral'structure moulded fromfibrous pulp comprising a series of cells tapering inwardly from theirtops to their bottoms, said cells being disposed in parallel rows andhaving a connecting web extending between their upper adjacentedges,,the lower portions or the walls of said cells being revertedinwardly and upwardly and a bottom of desired form extended betweeh saidreverted edges.

' 4. A cellular packing consistin of an integral structure mou1ded fromfi rous pulp comprising a'series of cells tapering inwardly from theirto s to their bottoms, said cells being dispose in parallel rows, andhaving a connecting web extending between their upper adjacent edggs,the web between cells adjacent rows ing extended above the tops of saidcells.

LOUIS SGHWARTZBEBG.

